Remove parent POM

For deployment to ImageJ's Maven repository.

Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>
Adjust SCM information in preparation to deploying to ImageJ's repsitory

Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>
[maven-release-plugin] prepare release pom-1.9-imagej